Atmospheric observations obtained during intensive
field experiments are used to characterize regional sources and test data
assimilation techniques. In this study, the STEM-2K1
(Sulfur Transport Eulerian Model, version 2K1) and its adjoint model are applied
to the analysis of observations from aircraft platforms made during the summer
2004 ICARTT (International Consortium for Atmospheric Research on Transport)
experiment. Observed ratios between CO2 and tracers and model
derived airmass markers are used to identify emission signatures, indicating
the influence of different sources. Model derived influence functions along
with assimilated transport model results of anthropogenic tracers are used to
characterize the anthropogenic CO2 emissions in the Midwest during the summer 2004 period. This analysis
gives an initial look at the Midwest domain
which is the focus of the expansion of NOAA Climate Monitoring and Diagnostic
Laboratory’s tall tower observation network and the upcoming Mid-Continent NACP
Intensive Campaign.
Author: J.E. Campbell, C.O. Stanier, G.R. Carmichael, et al
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